Dear useRs,
The new 'sets' package made it to CRAN, supporting:
o data structures for sets, fuzzy sets, multisets, and fuzzy multisets
o the use of (most) R objects as elements
o standard set operations (union, intersection, complement, Cartesian
product, power set, ...)
o support for several fuzzy logic systems
An introductory vignette is also available.
David and Kurt.